PHP recursive search based on key

arr_recursive_by_key.php

<?php

$data = [
	"key1" => [
		"key11" => "Ini level 1.1",
		"key12" => [
			"key121" => "Ini level 1.2.1",
			"key123" => "Ini level 1.2.3"
		],
	],
	"key2" => [
		"key21" => [
			"key211" => "Ini level 2.1.1",
			"key212" => "Ini level 2.1.2",
		]
	]
];

function recursiveFind(array $array, $needle)
{
    $iterator  = new RecursiveArrayIterator($array);
    $recursive = new RecursiveIteratorIterator(
        $iterator,
        RecursiveIteratorIterator::SELF_FIRST
    );
    foreach ($recursive as $key => $value) {
        if ($key === $needle) {
            return $value;
        }
    }
}

$getValue = recursiveFind($data, "key211");

var_dump($getValue);

?>